DTC Logic

Diagnosis Procedure
1.CHECK USB HARNESS
Visually check USB harness.
U1243 display unit
U1255 satellite radio tunerPower distribution system
System Description
INPUT/OUTPUT SIGNAL CHART
SYSTEM DESCRIPTION
POWER DISTRIBUTION SYSTEM (PDS) is the system that BCM controls
with the operation of the pushbutton
ignition switch and performs the power distribution to each power circuit.
This system is used instead
of the mec ...
Can communication
System Description
CAN (Controller Area Network) is a serial communication line for real time
application. It is an on-vehicle multiplex
communication line with high data communication speed and excellent error
detection ability. Many electronic
control units are equipped onto a vehicle, an ...
Diagnosis system (AV control unit)
Diagnosis Description
MULTIFUNCTION SWITCH AND PRESET SWITCH SELF-DIAGNOSIS FUNCTION
The ON/OFF operation (continuity) of each switch in the multifunction switch
and preset switch can be checked.
Self-Diagnosis Mode
Press the BACK switch and the
switch of the 8-direction switches with ...